diff --git a/test/test_assert_raises.py b/test/test_assert_raises.py
index 6b6b0b5..3f3649a 100644
--- a/test/test_assert_raises.py
+++ b/test/test_assert_raises.py
@@ -21,7 +21,7 @@ def test_assert_raises():
         "timeSeries has to be of type pandas.DataFrame\(\) or of type np.array\(\) in "
         "initialization of object of class TimeSeriesAggregation",
         tsam.TimeSeriesAggregation,
-        timeSeries="erroneousTimeSeries",
+        timeSeries=raw,
     )
 
     # check error messages for wrong attribute names added for extreme period methods
diff --git a/tsam/__init__.py b/tsam/__init__.py
index 7f9362f..af58795 100644
--- a/tsam/__init__.py
+++ b/tsam/__init__.py
@@ -7,5 +7,5 @@
         action="ignore",
         category=FutureWarning,
         append=True,
-        #message="The previous implementation of stack is deprecated and will be removed in a future version of pandas. See the What's New notes for pandas 2.1.0 for details. Specify future_stack=True to adopt the new implementation and silence this warning.",
+        message="*The previous implementation of stack is deprecated.*",
     )
\ No newline at end of file